Printing apparatus



Nov. 28, 1944. J. smKdvlTz PRINTING APPARATUS Filed Jain. 21, 1941 2 Sheets-Sheet l J8 fig- 2.

i zllt INV E NTOR J seph smkowfg cylinder presses. particularly to a chase which has as parts thereof bearers for cooperation with the cylinder bear- Patented Nov. 28, i944 UNITED I STATE PATENT OF IC PRINTING- APPARATUS Joseph Sinkovitz, Pittsburgh, Pa., assignor 3 to Miller Printing Machinery 00., Pittsburgh, Pa., a corporation. of Pennsylvania A AppIicationA JanuaryZI, 1941; Serial No. 375,131 8 Claims. (01. 101-490) This invention relates to printing apparatus and particularly to chases for use with bed and The invention relates more ers on a printing stroke. A A A The invention will be described as embodied in printing apparatus of the flat bed and cylinder type. AAs wellknown in the art, the bed and cylinder normally carry bearerswhich ride upon each other during'the printing stroke to insure thetransverse dimension of the form by employ- Aing achase adapted to betransferred to the press bed with a form locked up therein and positioned upon and fastened to the press bed between the proper'positioningand driving of the members of the printing couple during the actual printing A Ordinarily the bed Abearers are operation. screwed orAotherwise relatively permanently fastened to the pressbed and are considered to beapart of the bed proper. The printing formAAis locked upxin a chaser-and thechaseAwith the i form locked therein is transferred to the bed and placed upon the bed between the bed bearers and fastened in place for printing. With this.

standard type of construction the transverse di- A mension of the form is undesirably limited since i the chase including its longitudinally extending Consequently the transverse dimension of the form must be less than the transverse dimension be- A tween the inner vertical faces of thebedbearers bars must fit betweentthe bed bearers.

by at least twice the Width of thelongitudinally extending chase bars. l

The, undesirability of thus umiting the trans-- verse dimension of the form has long been appreciated. Attempts have been madetoincrease *Athe transverse dimension of the form relatively to that of the bed by eliminating the use of a chase and locking up theform between the bed bearers and transverselyextendingbars on the bed.

I While this enablesAa wider form to be used, since A it eliminates the longitudinally extending chase bars which in the standard construction lie between the' bed bearers and the form, itAis necessary to make up the form on the bed, which from the practical standpoint is virtually impossible, as printing establishmentsare not arranged to enableithis to be done; moreover, it is very inconvenient to set up a form on a press bed, and A furthermore the compositor working on the form and the form itself in the process'of being set up on the bed interfere with work on the press dur ing the time of setting up theform. The factis "that the proposals to make upthe form on the press bed and lock it in between the bed bearers and transversely extending bars on the bed is utterly impractical and never went-into general use. Instead, the art has'continued to restrict 55.

bed bearers. Thishas been appreciatedby those skilled in the art to beundesirable Abecause of the restriction imposedwith respect to the transverse dimension of the form, but no practicable A solution to the problem has been found priorto the present invention.

i I obviate allof the disadvantages of the prior artand provide fora form of the maximum width "relative to the width of the bed, yet which may be set up on the usual table employed for that purpose and then lockedAin a chase and when fso' lockedtransferred in the chaseto the press bed. I preferably do awaywith the bedbearers screwed or: otherwise more or less permanently fastened to the bed and I. formAthechase with bearersyadapted to cooperate with the cylinder bearers on a printing stroke. Thus the full width of the bed except for the transverse di mensions of the longitudinally extending chase bars may be used for the form. A No change in the, standard mode of setting up the form isrequired. This is done on the usual table removed from the pressso that work may be done on the press without interference while theformis being set up. Means are provided for fastening the these to the'bed in proper position so that the l bearers which form part of the chase and which A take the place ofthe standard bed bearers will properly cooperate with the cylinder bearers on a printing'stroke'. QThe chase is preferably fastened to the bed by means cooperating with the end portions of the chase. It is notnecessary to screw down the bearers or any part of the chase. "Other details, objects and advantages of the invention will becomeapparent as the following description of a present preferred embodiment .thereofproceeds;

In the accompanying drawings Ihave shown a present preferred embodiment ofthe invention,

l Figure 1 is a plan view with portions cut away oi a press bed with a chase fastened thereto, no formfbeing shown in the chase in order to more clearly show features of the construction;

Figure 2 is a vertical longitudinal cross-sectional View to enlarged scale andwith a portion cut away. taken on theline II-II- of Figure-1;

Figure 3 is a, vertical transverse cross-sectional view to enlarged scale and witha portion out i away taken on the line IIIIIIof Figure 1 and showing the bed with the chase thereon and also "ings, thereis shown a bed of a flat bed and cylinder press, the bed being designated generally by reference numeral 2. The bed shown is made of aluminum alloy, although the invention is not limited with respect to the particular v material or structure of the bed. A steel surface plate 3 lies upon the.central portion of the bed and is screwed or otherwise fastened thereto. At the longitudinal edges of the bed are steel strips 4 which are of the same thickness as the plate 3 and to all intents and purposes form lateral continuations of the plate 3.

The bed 2 is a standard bed except that in place of the strips l permanently attached bed bearers have been employed prior to the present invention. I eliminate these permanently attached bed bearers since, asabove explained,

I form my chase with bearers which on a printing stroke cooperate with the cylinder bearers.

The strips 4 are employed to cooperate with the plate 3 to provide the bed with a continuous fiat working surface. In place of using separate strips 4 I may widen the plate 3 to the full width of the bed. The cylinder forming the cooperating member of the printing couple is shown at 2a in Figure 3. It will be understood that the cylinder cooperates with the bed in the usual way except that the bearers on the bed. with which the cylinder bearers 2b contact on a printing stroke are part of the chase now to be described' The chase is designated generally by reference numeral 5. It comprises longitudinal bars Band transverse bars 1. The bars 6 and I are preferably more or less permanently connected together to form a permanent chase and the bars 6 and I may be welded or screwed together or otherwise suitably fastened together. Thebars 6. are adapted to extend longitudinallyof the bed, that is, in the direction of movement of the bed during printing. The bars I extend transversely of the bed. The width of the chase between the outer faces of the bars 6 is preferably equal to the width of the bed so that when the chase is laid upon the bed it covers the full width of the bed.

The longitudinalchase bars 6 are designed and machined to serve as bearers functioning as do bed bearers to cooperate with the cylinder bearers 2b in operation of the press. Each of the bars 6 has a plane machined central portion 8 adapted when the chase is applied to the bed to lie in a plane parallelto the plane of movement of the bed and inclined end approach portions 9 to insure bringing of the cylinder bearers 2b into proper cooperative relationship with the portions of the bed bearers uponoperation of the press without undesirable jarring.

Means are preferably provided for fastening the chase in proper position on the bed whereby the chase may be fastened to and unfastened from the bed veryquickly. To this end the bed is provided with a transverse bar In against which the front bar 1 of the chase is adapted of the portion I2 is such that it snugly fits 4 transversely within the recess H whereby to center the chase on the bed. Moreover, since the portion l2 underlies part of the bed bar I 0 when the chase is in place on the bed it holds down the front edge of the chase and insures that it will remain in proper relationship to the bed during operation of the press. The angular alignment of the chase relatively to the bed is provided for by abutment between the front bar 7 of the chase and the bed bar Ill. The chase is held forward against the bed bar IB by the usual clamps E3 connected with the bed andbearing against therear chase bar 1.

Thus I provide printing apparatus enabling the printer to employ a form of the maximum.

width relatively to the width of the bed but without necessitating setting up the printing form on the bed. Thus is solved a problem which has long existed in the art and the only attempted solution of which, so far as I am aware, has been to utilize the permanently attached bed bearers together with transverse bars on the bed in place of a chase, necessitating setting up of the form on the bed. v

While I have shown and'described a present preferred embodiment of the invention it is to be distinctly understood that the invention is not limited thereto but may be otherwise variously embodied within the scope of the following claims.

I claim: 1. Printing apparatus for a printing press whereby a form may be made up ofi the press bed and as made up transferred to the bed yet the full width of the bed may be effectively utilized, comprising a bearer chase having 1on gitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed, the outer edges of said longitudinally extending bars being spaced apart a distance approximating the full width of the bed, the inner edges of said bars defining the lateral limits of the form and the width of said bars approximating the width of the bearers of the member of the printing couple cooperating with the bed during printing, said bars constituting the bed bearers of the printing apparatus and engaging the bearers of the member of the printing couple cooperating with the bed during printing.

2. Printing apparatus fora printing press whereby a form may be made up off the press bed and as made up transferred to the bed yet the full width of the bed may be effectively utilized, comprising a bearer chase having longitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed, the outer edges of said longitudinally extending bars being spaced apart a distance approximating the'full width of the bed, the inner edges of said bars defining the lateral limits of the form and the width of said bars approximating the width of the bearers of the member'of the printing cou- 6. Printing apparatus comprising a printing ple cooperating with the bed during printing,

said bars constituting the bed bearers of the printing apparatus and engaging the bearers of the member of the printing couple cooperatingwith the bed during printing, and means cooperating with the ends of the chase for holding the chase in place on the bed.

3. Printing apparatus for a bed and cylinj der press whereby a form may be made up off the bed and as made up transferred to the bed yet the full width of the bedmay be effectively utilized, comprising a bearer chase having lon-.

gitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed, the outer edges of said longitudinally extending bars being spaced apart adistance approximating the full bed and as made up transferred to the bed yet the full Width of the bed may be efiectively utilized, comprising ,a bearer chase having longitudinally extending bars and means connecting,

said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed, the outer edges of said longitudinally extending bars being spaced apart a. distance approximating the full width of the bed, the inner edges of "said bars defining .the-lateral limits of the form and the width of press wherebya form may be made up off the said bars approximating the width of the cylinider bearers, said bars constituting the bed bearers of the printing apparatus and on the printing stroke engaging the cylinder bearers and driving the cylinder therethrough,, and means cooperating with the ends of the chase for holding the chase in place on the bed. i

5. Printing apparatus comprising a printing couple and a bearer chase adapted to lie on the bed of the printing couple, the bearer chase hav ing longitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed, the outer edges of said longitudinally extending bars being spaced apart a distance approximating the full width of the bed, the inner edges of said bars defining the lateral limits of theform and the width of said bars approximating the width of the bearers of the member of the printing couple cooperating with the bed during printing, said bars constituting the bed bearers of the printing apparatus and engaging the bearers of the member of the printing couple cooperating with the bedduring printing, whereby a form may be made up off the bed and as made up transferred to the bed yet the full width of the bed may be effectively utilized.

couple and a bearer chase adapted to lie on the bed of the printing couple, the bearer chase having longitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed,

the outeredges of said longitudinally extending bars being spaced apart a distance approximating the full width of the bed, the inner edges of said bars defining thelateral limits of the form and the width of said bars approximating the width of the bearers of the member ofthe printing couple cooperating with the bed during printing, said bars constituting the bed bearers of the printing apparatus and engaging the bearers of the memberof the printing couple cooperating with the bed during printing, whereby a form may be made up off the bed and as made up transferred to the bed yet the full width of the bed may be effectively utilized, and means coop-v crating with the iends of l the chasefor holding the chase in place on the bed. Y 7. Printing apparatus comprisinga cooperating bed and cylinder forming a printing couple and a'bearer chase adapted to lie on the bed,

the bearer chase having longitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from thebed, the outer edges of said longitudinally extending bars being spaced apart a distance approximating, the full width of the bed, the in-. ner edges of said bars defining the lateral limits of the form and the width of said bars approximating the width of the cylinder bearers, said bars constituting the bed bearers of the printing apparatus and on the printing stroke engaging the cylinder bearers and driving the cylinder therethrough, whereby aform may be made up off the bed and as made up transferred to the bed yet the full width of the bed may be efi'ec-i tively utilized.

8. Printing apparatus comprising a cooperat ing bed and cylinder forming a printing couple and a bearer chase adapted to lie on the bed, the bearer chase having longitudinally extending bars and means connecting said bars together in fixed relationship so that the chase with a form made up therein may be transferred to and from the bed,; the outer edges of said longitudinally extending bars being spaced apart .a distance approximating the full width of the bed, the inner edges of said bars defining the lateral limits of the form and the width ofsaid bars approximating the width of the cylinder bearers, saidbars constituting the bed bearersof the printing apparatus andon the printing stroke engaging the cylinder bearers and driving the the cylinder therethrough, whereby a form may be made up off the bed and as made up transferred to the bed yet the full width of the bed may be efiectively utilized, and means cooperating with the ends of the chase chase in place on the bed.

JOSEPH smxovrrz.

for holding the 

